采矿与安全工程学报 ›› 2014, Vol. 31 ›› Issue (6): 876-880.

• 论文 • 上一篇    下一篇

遗留煤柱诱发冲击地压机理及其防治技术研究

  

  1. 北京科技大学土木与环境工程学院,北京 100083
  • 出版日期:2014-11-15 发布日期:2014-12-01
  • 作者简介:杨伟利(1979—),男,河北省新乐市人,博士研究生,从事矿山压力及岩层控制方面的研究。 E-mail:Ywli20070101@sina.com Tel:13810523534
  • 基金资助:

    国家重点基础研究发展计划(973)项目(2010CB226803);国家自然科学基金项目(51274022,51174016)

Study on mechanisms of rock burst induced by a left coal pillar and prevention technology

  • Online:2014-11-15 Published:2014-12-01

摘要: 以某矿5301工作面40 m宽遗留煤柱为背景,通过理论计算和数值模拟得到遗留煤柱的垂直应力分布特征,并基于此研究了诱发冲击地压的机理:遗留煤柱未受工作面回采影响之前,所受阻抗力大于冲击力,发生冲击地压的可能性较小;但在回采阶段,工作面超前支承压力和煤柱原有应力叠加,造成冲击力大于阻抗力,冲击危险性大大增强。据此划分危险区范围及危险程度,通过对危险区实施预卸压和解危措施,使得工作面安全通过遗留煤柱危险区。应力动态监测结果验证了分析结果的准确性。

关键词: 遗留煤柱, 冲击地压, 诱发机理, 防治技术

Abstract: Taking left coal pillar with the width of 40 m in 5301 working face of a mine as the research background, the distribution characteristics of vertical stress has been obtained by means of theoretical calculation and numerical simulation. Based on this, the rock burst mechanisms are studied and the results are as follows: The impedance force of coal pillar is higher than impact force before disturbed by mining, so rock burst is less likely to occur. But in the stage of mining, the advance abutment pressure of working face is superposed by the original stress, consequently impact force is greater than resistance force and the risk of rock burst may increase greatly. According to this, the partition of dangerous areas and dangerous levels is obtained. The working face can pass by left coal pillar zones safely through implementing pressure relief and relief measures. The accuracy of the analysis result was proved by monitoring dynamic stress.

Key words: left coal pillars, rock burst, inducing mechanism, prevention technology